Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 21 (Q.No. 27)
27.
In steady laminar flow of a liquid through a circular pipe of internal diameter D, carrying a constant discharge, the hydraulic gradient is inversely proportional to
D
D2
D4
D5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
5 comments Page 1 of 1.

Apcivilian said:   3 years ago
D^4 is the right answer.

Vinay said:   4 years ago
The Correct answer is "C".

Saravanaraja said:   5 years ago
Yes correct @Vini.

Vini said:   6 years ago
Headloss=32uVL/yD^2.
= 32uQL/yAD^2.
= 32uLQ/yD^2(π/4)D^2.
=128 uLQ/yπD^4.

Therefore, hydraulic gradient=gf/L.
= 128 uQ/yπD^4.
Hf is inversely proportional to D^4.

Umesh JIT said:   7 years ago
Q = KIA.
A = (π /4)*D^2.

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